Buick LaCrosse III (2016-2019) yel/wht Wiring diagrams

73 8 SIG GND ADAPTIVE CRUISE IND APP LO REF (1) APP LOW REF 2 APP SIG (1) APP SIG (2) BATT POSITIVE VOLT BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/RED WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BODY CONTROL MODULE (UNDER FLOOR CONSOLE) BRAKE APPLY SENS CTRL BRAKE APPLY SENS LOW REF BRAKE APPLY SENS SIG BRAKE PEDAL POSITION SENSOR (TOP OF BRAKE PEDAL ASSEMBLY) BRAKE POS SENS LOW REF BRAKE POS SENS SIG BRN WIRE BRN/RED WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM CRUISE IND CRUISE/ETC/TCC BRK SIG DATA 2 (+) DK BLU WIRE DK BLU/WHT WIRE DK BLU/YEL WIRE DK GRN/WHT WIRE DRIVER INFORMATION CENTER DISPLAY ECM IGN FUSE ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) FUSE 20 FUSE 5 GMLAN GRY WIRE GRY/LT GRN WIRE HIGH SPD GMLAN SERIAL DATA (+) 1 HOT AT ALL TIMES HOT W/ IGNITION MAIN RELAY ENERGIZED INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK LOGIC LOW SPD LT GRN/WHT WIRE MAIN RELAY FUSED SUPPLY 2 RED WIRE RED/BRN WIRE RED/WHT WIRE RED/YEL WIRE RUN/CRANK IGN 1 VOLT SERIAL SERIAL DATA (-) (1) SET/COAST/RESUME/ ACCELERATE SW THROTTLE ACTUATOR CTRL CLOSE THROTTLE ACTUATOR CTRL OPEN THROTTLE POS SENS LOW REF THROTTLE POS SENS SIG UNDERHOOD FUSE BLOCK UP/DOWN SW SIG VIO/LT GRN WIRE WHT WIRE WHT/BLU WIRE WHT/LT GRN WIRE WHT/RED WIRE YEL WIRE YEL/WHT WIRE

BACKUP LP CTRL BLK WIRE BLK/YEL WIRE DRIVER OUTSIDE REAR VIEW MIRROR GLASS DRIVER OUTSIDE REAR- VIEW MIRROR GRN WIRE GRN/WHT WIRE HOT W/ IGNITION MAIN RELAY ENERGIZED IP BODY IGN FUSE LOGIC INSIDE REAR VIEW MIRROR MIRROR DIMMING MIRROR LOW REF MIRROR SIG NCA WIRE RED WIRE RUN/CRANK IGN 1 VOLT UNDERHOOD FUSE BLOCK VIO/GRY WIRE WHT/BLK WIRE YEL/WHT WIRE

BACKUP LAMPS CIRCUIT BLK WIRE BLK/BRN WIRE BLU/BRN WIRE BLU/GRN WIRE BRN/DK GRN WIRE COMPUTER DATA LINES SYSTEM CRN LT FUSE CRN RT FUSE DK BLU/WHT WIRE DK BLU/YEL WIRE DRIVER OUTSIDE REAR VIEW MIRROR COURTESY LAMP DRIVER OUTSIDE REAR- VIEW MIRROR GMLAN GRN WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GRY WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/LT GRN WIRE GRY/VIO WIRE GRY/YEL WIRE HAZARD SWITCH HAZARD WARNING SWITCH HOT AT ALL TIMES HOT W/ ENGINE CONTROLS IGNITION RELAY ENERGIZED INSTRUMENT CLUSTER LEFT AUXILIARY TAIL LAMP LEFT BACKUP LAMP LEFT CORNERING LAMP RELAY LEFT REAR COMPARTMENT LID TAIL LAMP ASSEMBLY LEFT REAR SIDE MARKER LAMP LEFT REAR TURN SIGNAL LAMP LEFT TAIL LAMP LEFT TAIL LAMP ASSEMBLY LEFT TAIL/STOP LAMP LEFT TURN IND LEFT TURN SIGNAL REPEATER LAMP LO SPD LOGIC LT GRN WIRE PARK LAMPS IND RED WIRE RED/BRN WIRE RIGHT CORNERING LAMP RELAY RIGHT TURN IND SER DATA (+) 2 UNDERHOOD FUSE BLOCK VIO WIRE VIO/GRY WIRE VIO/WHT WIRE WHT WIRE WHT/YEL WIRE YEL WIRE YEL/DK BLU WIRE YEL/GRY WIRE YEL/WHT WIRE

5 VOLT REF BLK WIRE BLK/BRN WIRE BLK/YEL WIRE BLU/WHT WIRE BRAKE PEDAL POSITION SENSOR BRK POS SENS BRK POS SENS SIG BRN/DK GRN WIRE BRN/YEL WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/YEL WIRE ENGINE CONTROL MODULE FUSE 20 GRN/VIO WIRE GRN/YEL WIRE GROUND DISTRIBUTION SYSTEM GRY/BRN WIRE GRY/GRN WIRE HI SPEED GMLAN HOT AT ALL TIMES INSTRUMENT PANEL FUSE BLOCK LO REF NCA WIRE RED/BRN WIRE RIGHT AUXILIARY TAIL LAMP RIGHT CORNERING LAMP RIGHT FRONT SIDE MARKER LAMP RIGHT FRONT TURN SIGNAL LAMP RIGHT HEADLAMP ASSEMBLY RIGHT PARK DAYTIME RUNNING LAMP RIGHT REAR COMPARTMENT LID TAIL LAMP ASSEMBLY SERIAL DATA (-) (1) VIO/GRN WIRE VIO/WHT WIRE W/ HID W/O HID WHT WIRE WHT/GRN WIRE WHT/LT GRN WIRE WHT/RED WIRE WHT/YEL WIRE YEL/WHT WIRE

BATT POS VOLT BLK WIRE BRIGHTNESS DK GRN/BLK WIRE FUSE 39 GROUND GY HEAD UP DISPLAY SIG HEAD-UP DISPLAY HEAD-UP DISPLAY SWITCH HOT AT ALL TIMES HUD HUD SW LOW REF HUD SW SIG ILL INFO INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK LIN SERIAL DATA BUS 12 LOGIC LT GRN WIRE LVDS RED/DK BLU WIRE RED/LT BLU WIRE YEL WIRE YEL/WHT WIRE

BATT POSITIVE VOLT BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/YEL WIRE BLU WIRE BRN/BLK WIRE BRN/YEL WIRE COMMON CTRL COMPUTER DATA LINES SYSTEM DEFOGGER SYSTEM DK BLU/DK GRN WIRE DK BLU/WHT WIRE DK GRN/WHT WIRE DOWN DRIVER OUTSIDE REAR VIEW MIRROR COURTESY LAMP DRIVER OUTSIDE REAR VIEW MIRROR GLASS DRIVER OUTSIDE REAR VIEW MIRROR MOTOR DRIVER OUTSIDE REAR- VIEW MIRROR DRIVER SEAT MEMORY SWITCH DRIVER SIDE OBJECT DETECTION INDICATOR DRIVER WINDOW/OUTSIDE REAR VIEW MIRROR SWITCH EXIT GRY/BRN WIRE GRY/GRN WIRE HOT AT ALL TIMES ILL LEFT LEFT TURN SIGNAL REPEATER LAMP LH (-) RH (+) SIG LIN DATA BUS 8 LOGIC LOW REF MIRROR DIMMING MIRRORS SYSTEM NAVIGATION SYSTEM RED/BLU WIRE RED/DK BLU WIRE RH (+) LH (-) CTRL RIGHT RWD SET- UNDERHOOD FUSE BLOCK UP (+) DOWN (-) CTRL UP DOWN SIG VIO/DK BLU WIRE VIO/RED WIRE WHT WIRE WHT/YEL WIRE WNDW MIR SEAT FUSE YEL WIRE YEL/BRN WIRE YEL/WHT WIRE

AUDIO AMPLIFIER BATT POS VOLT BLK WIRE BLU/BLK WIRE BLU/GRY WIRE BLU/YEL WIRE BRN/DK BLU WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/BLK WIRE DK BLU/YEL WIRE DK GRN WIRE DK GRN/BLK WIRE FC SPEAKER CTRL (+) GMLAN SERIAL DATA 2 GRN/BLK WIRE GRN/BRN WIRE GRN/VIO WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/VIO WIRE LEFT FRONT RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE LF SPEAKER (-) CTRL 1 LF SPEAKER SIG (-) 1 LR SPEAKER (+) CTRL LR SPEAKER SIG (-) MICROPHONE 1 LOW REF MICROPHONE 1 SIG MICROPHONE 2 LOW REF MICROPHONE 2 SIG MICROPHONE 3 LOW REF MICROPHONE 3 SIG MOST CONTROL MOST SERIAL DATA (+) REAR RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE RED/BRN WIRE RED/LT BLU WIRE RED/VIO WIRE REPLICATED SIG RF SPEAKER (-) CTRL 1 RF SPEAKER SIG (-) 1 RIGHT FRONT RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE RR SPEAKER (+) CTRL RR SPEAKER SIG (-) SPEAKER (-) LOW REF SPEAKER CTRL (+) VIO/DK BLU WIRE WHT WIRE WHT/BLK WIRE WHT/LT GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE YEL/BRN WIRE YEL/WHT WIRE

BATT POS VOLT BLK WIRE BLK/YEL WIRE BLU WIRE BRN/BLK WIRE BRN/YEL WIRE COM CTRL DEFOGGER SYSTEM DK BLU/WHT WIRE DOWN DOWN CTRL DRIVER OUTSIDE REAR VIEW MIRROR COURTESY LAMP DRIVER OUTSIDE REAR VIEW MIRROR GLASS DRIVER OUTSIDE REAR VIEW MIRROR MOTOR DRIVER OUTSIDE REAR- VIEW MIRROR DRIVER SIDE OBJECT DETECTION INDICATOR DRIVER WINDOW/ OUTSIDE REAR VIEW MIRROR SWITCH ELECTROCHROMIC MIRROR CIRCUIT GRN/BLK WIRE GRN/VIO WIRE GRY/GRN WIRE HOT AT ALL TIMES LEFT LEFT TURN SIGNAL REPEATER LAMP LOGIC MIRROR DIMMING NAVIGATION SYSTEM OFF PASSENGER OUTSIDE REAR VIEW MIRROR PASSENGER OUTSIDE REAR VIEW MIRROR COURTESY LAMP PASSENGER OUTSIDE REAR VIEW MIRROR GLASS PASSENGER OUTSIDE REAR VIEW MIRROR MOTOR PASSENGER SIDE OBJECT DETECTION INDICATOR RED/BLU WIRE RIGHT RIGHT TURN SIGNAL REPEATER LAMP UNDERHOOD FUSE BLOCK UP CTRL VIO/BLU WIRE WHT WIRE WNDW MIR SEAT FUSE YEL/BRN WIRE YEL/VIO WIRE YEL/WHT WIRE

BATT POS VOLT BLK WIRE BLU/GRY WIRE BRN/DK BLU WIRE CENTER INSTRUMENT PANEL SPEAKER COMPUTER DATA LINES SYSTEM DISPLAY DISPLAY SIG + DK BLU WIRE DK BLU/YEL WIRE DK GRN WIRE DK GRN/BLK WIRE DK GRN/DK BLU WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE FUSE 16 FUSE 38 GRN/BLK WIRE GRY/GRN WIRE HOT AT ALL TIMES INFO DISPLAY MODULE INFOTAINMENT INSTRUMENT PANEL FUSE BLOCK LEFT FRONT DOOR SPEAKER LEFT FRONT TWEETER SPEAKER LEFT REAR DOOR SPEAKER LEFT SUBWOOFER SPEAKER LOGIC LOW SPEED GMLAN LVDS MEDIA DISC PLAYER RADIO CONTROLS RED/BRN WIRE RED/LT BLU WIRE RED/VIO WIRE RED/YEL WIRE REPLICATED SERIAL DATA 2 SERIAL DATA BUS 10 SERIAL DATA BUS 5 SIG VIO/DK BLU WIRE YEL/WHT WIRE

AUDIO AMPLIFIER BATT POS VOLT BLK WIRE BLU/BLK WIRE BLU/GRY WIRE BLU/YEL WIRE BRN/DK BLU WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK BLU/BLK WIRE DK BLU/YEL WIRE DK GRN WIRE DK GRN/BLK WIRE FC SPEAKER CTRL (+) GMLAN SERIAL DATA 2 GRN/BLK WIRE GRN/BRN WIRE GRN/VIO WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/BRN WIRE GRY/GRN WIRE GRY/VIO WIRE LEFT FRONT RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE LF SPEAKER (-) CTRL 1 LF SPEAKER SIG (-) 1 LR SPEAKER (+) CTRL LR SPEAKER SIG (-) MICROPHONE 1 LOW REF MICROPHONE 1 SIG MICROPHONE 2 LOW REF MICROPHONE 2 SIG MICROPHONE 3 LOW REF MICROPHONE 3 SIG MOST CONTROL MOST SERIAL DATA (+) REAR RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE RED/BRN WIRE RED/LT BLU WIRE RED/VIO WIRE REPLICATED SIG RF SPEAKER (-) CTRL 1 RF SPEAKER SIG (-) 1 RIGHT FRONT RADIO VOLUME COMPENSATOR INTERIOR NOISE MICROPHONE RR SPEAKER (+) CTRL RR SPEAKER SIG (-) SPEAKER (-) LOW REF SPEAKER CTRL (+) VIO/DK BLU WIRE WHT WIRE WHT/BLK WIRE WHT/LT GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE YEL/BRN WIRE YEL/WHT WIRE